#include <stdio.h>
int main()
{
    //整型数据
    //int a = 10.5;
    //printf（"%u\n",a);
    
    //长整型数据
    //long a = 10;
    //printf("%ld size : %ld\n",a,sizeof(a));

    //短整数
    //short a = 10;
    //printf("%ld size : %ld\n",a,sizeof(a));


    //字符型
    //char a = 'A';
    //printf("大小 ： %dld : %c\n",sizeof(char),a);

    //浮点型 ： 近似值 > <
    //float a = 1.2;
    //默认保留小数点后6位
    //printf("%.2f size : %ld\n",a,sizeof(a));

    //双精度型
    double a = 3.1415926;
    //printf("%.7f size : %ld\n",a,sizeof(a));

    // long double a;
    //printf("size : %ld\n",sizeof(a));

    return 0;
}